Link found by my friend Zubiko
Some interesting things are written here

We know know that for E4.radek tymecki wrote:Equinoxe 4 rhytm was created on Rhytmicomputer / JMJ improvised with switches and created main rhytm
Oxygene 3 - EMS Synthi
Sure, but if I found something that sounded better than the combo I mentioned above I would've written about it. I haven't so far.Jakob BC wrote:Why the KR-55? It could have been a bunch of other stuff
Chris is of course referring to the EKO Computerhythm.Notes
Back in summer 1973 Peter Baumann had left Berlin to travel in Nepal and India, so TD were reduced to the duo Edgar Froese and Chris Franke. Virgin Records in London were impressed by the burgeoning following of the group and wanted to sign them up. In Peter Baumann's absence, Edgar Froese and Chris Franke entered the Skyline Studios in Berlin to record Green Desert, using such devices as a rhythm controller and phaser along with the usual synthesisers and keyboards. As Chris Franke remembers: "The rhythm controller came from Italy and looked like something from science fiction with its console of 128 buttons which all lit up. It could be programmed, it was analogue and it was polyphonic! The lights blinked, I had hands on control and later I used it as a sequencer to trigger other synthesizers."